CVE-2020-3513: Cisco IOS XE Software for Cisco ASR 900 Series Route Switch Processor 3 Arbitrary Code Execution Vulnerabilities
First published: Thu Sep 24 2020(Updated: )
Multiple vulnerabilities in the initialization routines that are executed during bootup of Cisco IOS XE Software for Cisco ASR 900 Series Aggregation Services Routers with a Route Switch Processor 3 (RSP3) installed could allow an authenticated, local attacker with high privileges to execute persistent code at bootup and break the chain of trust. These vulnerabilities are due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit these vulnerabilities by copying a specific file to the local file system of an affected device and defining specific ROMMON variables. A successful exploit could allow the attacker to run arbitrary code on the underlying operating system (OS) with root privileges. To exploit these vulnerabilities, an attacker would need to have access to the root shell on the device or have physical access to the device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.12.1 | |
| Cisco IOS XE | =17.2 | |
| Cisco Asr 902 | ||
| Cisco ASR 903 | ||
| Cisco Asr 907 | ||
| Cisco Ncs 4206 | ||
| Cisco Ncs 4216 | ||
| Cisco Ncs 4216 F2b |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3513?
CVE-2020-3513 is a vulnerability in the initialization routines of Cisco IOS XE Software for Cisco ASR 900 Series Aggregation Services Routers.
What is the severity of CVE-2020-3513?
CVE-2020-3513 has a severity rating of 6.7, which is considered medium.
Which software versions are affected by CVE-2020-3513?
Cisco IOS XE Software versions 16.12.1 and 17.2 are affected by CVE-2020-3513.
How can an attacker exploit CVE-2020-3513?
An authenticated, local attacker with high privileges can exploit CVE-2020-3513 to execute persistent arbitrary code during bootup.
Where can I find more information about CVE-2020-3513?
More information about CVE-2020-3513 can be found in the Cisco Security Advisory at https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-rsp3-rce-jVHg8Z7c
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